check your clipboard setting, if you are using windows then:
go to C:/windows/system32/clipboard.exe and check your setting
else if you have c or c++, then run below code:
#include<stdio.h>
int main(){
FILE *sf, *df;
char ch;
sf = fopen("your path of source file","r");
df = fopen("your path of blank file","w");
while(1){
ch = fgetc(sf);
if(ch == EOF)
break;
fputc(ch,df);
}
return 0;
}
this will work